Tunnelling and Underground Space Technology最新文献_第5页

Failure mechanism and stability control of fault induced by underground cavern excavation: insights from theoretical analysis and numerical modeling 地下洞室开挖断层破坏机制与稳定性控制：理论分析与数值模拟的启示

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107410

Guangzhe Tao , Zongqing Zhou , Bing Shao , Ning Liu , Chenglu Gao , Daosheng Zhang

The fault is one of the key factors that restricts the stability of surrounding rock masses in underground caverns. A comprehensive method including theoretical analysis, numerical simulation, and field investigation was conducted to investigate the failure mechanisms and control strategy of fault based on the underground cavern of the Kala (KL) hydropower station in Southwest China. Firstly, a mechanical failure criterion of fault failure was derived based on Anderson’s fault stress model and the Mohr-Coulomb criterion. Then, discrete element numerical software 3DEC was used to reveal the evolution process of fault slip and the influence mechanisms of system parameters, including shear stiffness, fault dip angle, and shear strength. Finally, a support and control strategy for fault stability was proposed based on the fault instability failure mechanism, which was implemented in the field. The results indicate that fault stability increases with increasing internal friction angle, cohesion, and minimum principal stress, but decreases with increasing maximum principal stress. The fault slip process exhibits three distinct successive stages: slow growth, rapid evolution, and stable equilibrium. Numerical results show that fault slip displacement follows a nonlinear trend with increasing dip angle (increasing first and then decreasing) and decreases significantly with higher shear stiffness and internal friction angle. A synergistic support strategy including “precision blasting + timely support” and “shotcrete + prestressed rockbolt + prestressed cables” was proposed based on the fault failure mechanism, which significantly reduces the risk of fault instability activation. Field monitoring indicates that the support scheme significantly reduces the tendency for fault instability, enhancing the stability of the surrounding rock.

断层是制约地下洞室围岩稳定性的关键因素之一。以西南Kala水电站地下洞室为例，采用理论分析、数值模拟和现场调查相结合的综合方法，对断层破坏机理和控制策略进行了研究。首先，基于Anderson断层应力模型和Mohr-Coulomb准则，推导了断层破坏的力学破坏准则；利用离散元数值软件3DEC揭示了断层滑动的演化过程以及剪切刚度、断层倾角、剪切强度等系统参数的影响机制。最后，基于故障失稳失效机理，提出了故障稳定的支持与控制策略，并在现场实施。结果表明：断层稳定性随内摩擦角、黏聚力和最小主应力的增大而增大，随最大主应力的增大而减小；断层滑动过程表现出三个明显的连续阶段：缓慢生长、快速演化和稳定平衡。数值结果表明，断层滑动位移随倾角的增大呈先增大后减小的非线性趋势，随剪切刚度和内摩擦角的增大而显著减小。根据断层破坏机理，提出了“精密爆破+及时支护”和“喷射混凝土+预应力锚杆+预应力索”的协同支护策略，显著降低了断层失稳激活的风险。现场监测结果表明，该支护方案明显降低了断层失稳的趋势，提高了围岩的稳定性。

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引用次数: 0

Experimental investigation on the fire performance of novel multi-scale fiber reinforced UHPC segments 新型多尺度纤维增强UHPC管片防火性能试验研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107417

Yao Zhang , Ruanxiang Xiong , Panpan Cheng , Yibo Chen , Weigang Zhao , Kaihang Han , Xi Jiang , Hehua Zhu , Zhiguo Yan

The limitations of conventional reinforced concrete (RC) lining segments in complex geological and fire-prone environments have driven the demand for more durable and fire-resilient materials in shield tunnel construction. Ultra-high-performance concrete (UHPC) offers outstanding strength and durability but is vulnerable to explosive spalling and rapid strength degradation at elevated temperatures. This study develops a multi-scale fiber-reinforced ultra-high-performance concrete (MSFUHPC) incorporating steel, polyethylene, and carbon fibers, together with fly ash cenospheres (CE), aiming to enhance thermal stability, suppress spalling, and reduce thermal degradation through their synergistic effects. Comparative experiments investigate the spalling behavior and mechanical performance of MSFUHPC segments with and without rebars, under both ambient conditions and hydrocarbon (HC) fire conditions. Results show that MSFUHPC segments exhibit superior fire resistance, reduced spalling depth, and improved load-bearing capacity compared with conventional concrete. CE-containing segments exhibit a maximum spalling depth of only around 5 mm and retain up to 2.9 times the post-fire load-bearing capacity of RC linings. Rebars further mitigate spalling and enhance post-fire ductility by improving heat dissipation and stress redistribution, and their partial strength recovery after cooling contributes to residual capacity retention. Overall, MSFUHPC demonstrates excellent mechanical stability, spalling resistance, and post-fire recovery, offering a practical and fire-resilient material solution for next-generation shield tunnel linings.

传统钢筋混凝土（RC）衬砌管片在复杂地质和火灾易发环境中的局限性，推动了盾构隧道施工对更耐用和耐火材料的需求。超高性能混凝土（UHPC）具有出色的强度和耐久性，但在高温下容易发生爆炸性剥落和强度迅速退化。本研究开发了一种多尺度纤维增强高性能混凝土（MSFUHPC），该混凝土将钢、聚乙烯和碳纤维与粉煤灰微球（CE）结合在一起，旨在通过它们的协同作用增强热稳定性，抑制剥落，减少热降解。对比实验研究了在环境条件和碳氢化合物（HC）火灾条件下，带钢筋和不带钢筋的MSFUHPC管段的剥落行为和力学性能。结果表明，与常规混凝土相比，MSFUHPC段具有更好的耐火性能，减少了剥落深度，提高了承载能力。含ce段的最大剥落深度仅为5毫米左右，其火灾后承载能力是RC衬里的2.9倍。钢筋通过改善散热和应力再分配，进一步减轻剥落，提高火灾后的延性，冷却后的部分强度恢复有助于保留剩余容量。总体而言，MSFUHPC具有优异的机械稳定性、抗剥皮性和火灾后恢复能力，为下一代盾构隧道衬砌提供了实用的耐火材料解决方案。

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引用次数: 0

Uncertainty-aware geological prediction in TBM tunneling: A probabilistic bayesian framework with exploratory multi-source label construction 隧道掘进机掘进中不确定性感知地质预测：一个探索性多源标签构建的概率贝叶斯框架

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107424

Jinghuan Pan, Hang Lin, Jinbiao Wu

Deep learning models for TBM geological prediction suffer from two critical limitations: they provide only single-point estimates, which are unreliable when encountering unknown conditions, and they struggle with the multi-source heterogeneity between continuous operational data and discrete geological information. To address these challenges, this study proposes an uncertainty quantification framework that integrates a Gaussian Mixture Model (GMM) with a Probabilistic Bayesian Convolutional Neural Network (PBCNN). First, the GMM clusters TBM operational parameters to establish a data-driven labeling system, effectively resolving the data heterogeneity. The optimal number of clusters is determined using internal evaluation metrics. Subsequently, a PBCNN architecture, tailored for tabular time-series data, is constructed to decompose the model’s predictive uncertainty into its epistemic and aleatoric components. The framework’s effectiveness was validated using field data from the Bainikeng Station section of the Shenzhen-Dayawan Intercity Railway project. Four typical operational scenarios were designed—Unknown Geological Conditions, Changing Operational Status, Data Proportion Fluctuation, and Different Noise Environments—for systematic testing. The results demonstrate that our method not only achieves high predictive accuracy but also provides a quantitative assessment of prediction credibility and risk. This establishes a more robust and generalizable paradigm for geological identification and intelligent decision-making in TBM construction.

用于TBM地质预测的深度学习模型有两个关键的局限性：它们只能提供单点估计，在遇到未知条件时不可靠；它们难以处理连续操作数据和离散地质信息之间的多源异质性。为了解决这些挑战，本研究提出了一个不确定性量化框架，该框架将高斯混合模型（GMM）与概率贝叶斯卷积神经网络（PBCNN）相结合。首先，将GMM聚类TBM运行参数，建立数据驱动的标注系统，有效解决数据异质性问题。使用内部评估指标确定集群的最佳数量。随后，构建了针对表格时间序列数据定制的PBCNN架构，将模型的预测不确定性分解为其认知和任意组件。通过深圳—大亚湾城际铁路白坑站段的现场数据验证了该框架的有效性。设计了未知地质条件、运行状态变化、数据比例波动和不同噪声环境4种典型运行场景进行系统测试。结果表明，该方法不仅具有较高的预测精度，而且能够对预测可信度和风险进行定量评估。这为隧道掘进机施工中的地质识别和智能决策建立了一个更加稳健和可推广的范例。

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引用次数: 0

Enhanced Swin-Transformer model for real-time assessment of overall shield machine cutterhead wear 用于实时评估盾构机整体刀盘磨损的增强型swing - transformer模型

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107420

Haoyu Li, Shifan Qiao, Daolong Chen, Junkun Tan, Baoquan Cheng

Real-time assessment of overall shield machine cutterhead wear is vital for tunneling safety, efficiency, and intelligent decision-making. However, most existing methods focus on individual cutter prediction or offline analysis, limiting their on-site applicability. To address this challenge, a real-time-capable framework is developed to assess cutterhead wear from routine shield machine operational parameters. It comprises: (i) a unified, physics-grounded index that consolidates disc, chisel, and auxiliary cutter states into a cutterhead-level label; (ii) a data-stream filter that extracts stable non-overlapping operational windows via a sliding search mechanism; and (iii) an enhanced Swin-Transformer model (Swin-ICB Net) that introduces an Interactive Convolutional Block and dynamic loss switching to improve short-window classification and mitigate class imbalance. Validation on field data from Shenzhen Metro Line 14 shows an average accuracy of 95.53 % across three wear levels and an average inference latency of 3.613 ms, substantiating its capability for high-accuracy, real-time assessment. Compared to baseline models and TimesNet, it yields a 2.3 % and 2.7 % improvement in accuracy, respectively. Additional tests on geologically distinct sections confirm its generalization capability. The proposed method offers a practical solution for intelligent cutterhead condition monitoring and shows strong potential to support automated maintenance planning and operational decision-making.

盾构机刀盘整体磨损的实时评估对于隧道掘进的安全、高效和智能决策至关重要。然而，大多数现有方法侧重于单个刀具预测或离线分析，限制了其现场适用性。为了应对这一挑战，开发了一种实时框架，可以根据常规盾构机的操作参数评估刀盘磨损情况。它包括：(i)一个统一的、基于物理的索引，它将圆盘、凿子和辅助刀具状态整合到一个刀具级标签中；（ii）通过滑动搜索机制提取稳定的非重叠操作窗口的数据流过滤器；（iii）增强的swwin - transformer模型（swwin - icb Net），该模型引入了交互式卷积块和动态损失切换，以改进短窗口分类并减轻类不平衡。对深圳地铁14号线现场数据的验证表明，该方法在三个磨损水平下的平均准确率为95.53%，平均推理延迟为3.613 ms，证明了其具有高精度、实时评估的能力。与基线模型和TimesNet相比，它的准确率分别提高了2.3%和2.7%。另外对不同地质剖面的试验也证实了该方法的泛化能力。该方法为智能刀盘状态监测提供了一种实用的解决方案，并显示出支持自动化维护计划和操作决策的强大潜力。

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引用次数: 0

A thin-shell model for densely packed pre-reinforcement shell structures in weak rock tunnels 弱岩隧道密排预加固壳结构的薄壳模型

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107406

Zhongzhi Xie , Guangze Dan , Guohua Zhang , Shishu Zhang , Zhaoming Ma , Feng Xiong , Dongjie Hua

Pipe roofs, horizontal jet grouting piles, and analogous pre-reinforcement technologies form a continuous thin shell composed of densely arranged cylindrical elements, herein defined as the densely packed pre-reinforcement shell structure. These structures are critical for weak rock tunnels. However, existing analytical models, primarily based on elastic foundation beam theory, oversimplify these systems as a set of linear superposition of discrete beams, neglecting coupled longitudinal–transverse load-bearing mechanisms. This limitation leads to significant theory-monitoring deviations, hindering design optimization. To overcome this limitation, a densely packed pre-reinforcement shell model is developed using elastic thin-shell theory, incorporating nonlinear governing equations that resolve coupled longitudinal–transverse load-bearing mechanisms. The model minimizes displacement prediction errors to under 14% in comparison to case monitoring data. The model parameter sensitivity analyses reveal a key finding that the excavation radius and equivalent stiffness of the structure jointly account for 69.44% of the variance in shell displacement. Additionally, a Mohr-Coulomb strength criterion-based design framework is established to dynamically match structural stiffness of the structure with varying conditions in weak rock tunnels. The proposed model establishes a full-chain solution, integrating theoretical modeling, displacement calculation, and structural design, for the densely packed pre-reinforcement structure in weak rock tunnels.

管屋面、水平喷射注浆桩及类似的预加固技术，由密集排列的圆柱形构件组成连续的薄壳结构，此处定义为密装预加固壳结构。这些结构对弱岩隧道至关重要。然而，现有的分析模型主要基于弹性基础梁理论，将这些系统过于简化为离散梁的线性叠加，而忽略了纵向-横向耦合的承载机制。这种限制导致了显著的理论监测偏差，阻碍了设计优化。为了克服这一限制，利用弹性薄壳理论建立了密集填充预加固壳模型，并结合非线性控制方程来解决纵向-横向耦合承重机制。与病例监测数据相比，该模型将位移预测误差降至14%以下。模型参数敏感性分析揭示了一个关键发现，即开挖半径和结构等效刚度共同占壳位移方差的69.44%。建立了基于Mohr-Coulomb强度准则的设计框架，对软弱围岩隧道中不同条件下的结构刚度进行动态匹配。该模型建立了集理论建模、位移计算和结构设计于一体的弱岩隧道密排预加固结构全链解。

{"title":"A thin-shell model for densely packed pre-reinforcement shell structures in weak rock tunnels","authors":"Zhongzhi Xie , Guangze Dan , Guohua Zhang , Shishu Zhang , Zhaoming Ma , Feng Xiong , Dongjie Hua","doi":"10.1016/j.tust.2025.107406","DOIUrl":"10.1016/j.tust.2025.107406","url":null,"abstract":"<div><div>Pipe roofs, horizontal jet grouting piles, and analogous pre-reinforcement technologies form a continuous thin shell composed of densely arranged cylindrical elements, herein defined as the densely packed pre-reinforcement shell structure. These structures are critical for weak rock tunnels. However, existing analytical models, primarily based on elastic foundation beam theory, oversimplify these systems as a set of linear superposition of discrete beams, neglecting coupled longitudinal–transverse load-bearing mechanisms. This limitation leads to significant theory-monitoring deviations, hindering design optimization. To overcome this limitation, a densely packed pre-reinforcement shell model is developed using elastic thin-shell theory, incorporating nonlinear governing equations that resolve coupled longitudinal–transverse load-bearing mechanisms. The model minimizes displacement prediction errors to under 14% in comparison to case monitoring data. The model parameter sensitivity analyses reveal a key finding that the excavation radius and equivalent stiffness of the structure jointly account for 69.44% of the variance in shell displacement. Additionally, a Mohr-Coulomb strength criterion-based design framework is established to dynamically match structural stiffness of the structure with varying conditions in weak rock tunnels. The proposed model establishes a full-chain solution, integrating theoretical modeling, displacement calculation, and structural design, for the densely packed pre-reinforcement structure in weak rock tunnels.</div></div>","PeriodicalId":49414,"journal":{"name":"Tunnelling and Underground Space Technology","volume":"170 ","pages":"Article 107406"},"PeriodicalIF":7.4,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and numerical study on dynamic behavior of shield tunnels with internal structures under internal explosions 内爆作用下盾构隧道动力特性试验与数值研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-02 DOI: 10.1016/j.tust.2025.107416

Mengtao Xia , Hao Lu , Long Zhou , Yuxuan Wang , Ziming Xiong , Zhouhong Zong

With the increasing complexity of regional conflicts and the rising frequency of chemical and fuel gas explosion accidents, potential threats to critical infrastructure have grown. However, research on the blast resistance of shield tunnels remains limited. This study investigates the dynamic response of shield tunnels with internal structures under internal explosions using a combined experimental and numerical approach. Field blast tests were conducted on a large-scale shield tunnel model incorporating internal structures. A high-fidelity finite element model was developed and validated against the experimental results. It was found that the dominant failure modes of the shield lining are shear dislocation between shield rings and concrete cracking and spalling near the exposed bolt holes, with the damage location depending on the charge weight. Internal structures primarily experience bending of the flue panel and top slab, accompanied by localized blast craters beneath the explosive. Furthermore, the effects of joint arrangement were investigated, revealing that types of bolts and assembly methods significantly influence the failure modes of shield tunnels under internal explosions.

随着地区冲突日益复杂，化学和燃气爆炸事故日益频繁，对关键基础设施的潜在威胁日益增加。然而，对盾构隧道的抗爆性能的研究还很有限。采用实验与数值相结合的方法研究了内爆作用下盾构隧道的动力响应。采用大型盾构隧道内部结构模型进行了现场爆破试验。建立了高保真有限元模型，并与实验结果进行了对比验证。结果表明：盾构衬砌的主要破坏形式为盾构环间剪切错位和暴露螺栓孔附近混凝土开裂剥落，损伤位置与装药量有关；内部结构主要经历烟道板和顶板的弯曲，并伴有炸药下方的局部爆炸坑。此外，还研究了接缝布置的影响，揭示了螺栓类型和组合方式对盾构隧道内爆破坏模式的影响。

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引用次数: 0

A novel reinforced concrete lining with an induced crack for high-pressure tunnels: Numerical simulation 一种新型高压隧道钢筋混凝土衬砌诱导裂缝的数值模拟

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2026-01-01 DOI: 10.1016/j.tust.2025.107422

Qiang Zhang , Chaojun Jia , Weijiang Wu , Xiaogang Wang , Lipeng Liu , Zhengyun Qin , Liang Wang

Reinforced concrete linings are extensively employed in hydraulic tunnel construction due to their well-established technology, rapid installation, and cost-effectiveness. However, under high internal water pressure, these linings are prone to tensile cracking, with crack characteristics and widths significantly influencing seepage behavior and long-term durability. In conventional designs, crack formation is often unpredictable due to variations in geological conditions and construction quality, complicating monitoring and control efforts. To address this, we propose a novel reinforced concrete lining featuring an induced crack, strategically designed to guide cracking at a predetermined location. A comprehensive investigation combining physical model testing and numerical simulation was conducted to evaluate the feasibility and mechanical behavior of the proposed design. In the laboratory, a scaled tunnel model incorporating a prefabricated induced crack was constructed and subjected to internal water pressure loading, allowing direct observation of crack initiation and seepage behavior. Based on the experimental results, a discrete element dual-medium seepage–stress–cracking coupling numerical model was developed and validated. This model facilitated a detailed analysis of internal and external water pressure dynamics, lining and reinforcement stresses, and crack propagation during the initial water-filling phase. Results demonstrate that tensile stress at the induced crack tip drives cracking along the intended path, with no additional cracks forming elsewhere in subsequent stages. The influence factors of lining crack width were analyzed and the existing design standards of concrete lining for pressure tunnels in China were discussed. These findings offer valuable theoretical insights into the design and construction of high-pressure hydraulic tunnels.

钢筋混凝土衬砌因其技术成熟、安装快捷、经济高效而广泛应用于水工隧道施工中。然而，在高内水压作用下，这些衬砌容易出现拉伸裂缝，裂缝的特征和宽度对渗流行为和长期耐久性有显著影响。在常规设计中，由于地质条件和施工质量的变化，裂缝的形成往往是不可预测的，这使监测和控制工作复杂化。为了解决这个问题，我们提出了一种具有诱导裂缝的新型钢筋混凝土衬砌，其设计策略是在预定位置引导裂缝。通过物理模型试验和数值模拟相结合的综合研究，评估了所提出设计的可行性和力学行为。在实验室中，构建了包含预制诱导裂缝的比例隧道模型，并进行了内部水压加载，可以直接观察裂缝的起裂和渗流行为。基于试验结果，建立了离散元双介质渗流-应力-开裂耦合数值模型并进行了验证。该模型有助于详细分析初始充水阶段的内部和外部水压动态、衬砌和钢筋应力以及裂缝扩展。结果表明，诱导裂纹尖端的拉应力驱动裂纹沿着预定路径，在后续阶段没有在其他地方形成额外的裂纹。分析了衬砌裂缝宽度的影响因素，探讨了国内既有压力隧道混凝土衬砌设计标准。这些发现为高压水力隧道的设计和施工提供了有价值的理论见解。

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引用次数: 0

Simulation and treatment for water leakage in tunnel lining model through self-healing materials 隧道衬砌渗漏自愈模型的模拟与处理

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-12-31 DOI: 10.1016/j.tust.2025.107431

Chunyu Zhang , Rentai Liu , Lianzhen Zhang , Yue Wang , Qingsong Zhang , Dukun Zhao

Tunnel lining structures commonly develop cracks and water leakage. Treatment materials are susceptible to secondary damage from structural stress and deformation. The purpose of this study is to assess the applicability of high-toughness self-healing materials for treating water leakage in tunnel lining structures and examines the performance of the lining after secondary damage. This is innovative and prospective. The main method is experimentation. Through testing the self-healing indicators of compressive strength, permeability coefficient, surface crack closure, and porosity, the self-healing effectiveness of the four proportioned specimens are compared and evaluated. Through simulation experiments, the crack development and water leakage in the lining structure after initial damage, treatment, and secondary damage are compared between ordinary mortar and self-healing materials. The results show that high-toughness self-healing specimens containing polyvinyl alcohol fibers and microcapsules demonstrate the best self-healing performance across various properties under different damage levels and maintain high self-healing efficiency even under sustained constant load. In the lining model, longitudinal, oblique, and circumferential cracks appear after initial damage. Drips and water flows form at some cracks, and some cracks gradually penetrate, forming wet marks. After surface repair, no significant differences are observed between ordinary mortar and self-healing materials as treatment materials. However, compared to ordinary mortar, self-healing materials develop significantly finer cracks and less water leakage after secondary damage, and microcracks are autonomously repaired after curing. The crack development and water leakage after secondary damage differ between the two materials, highlighting the superiority of self-healing materials for tunnel lining treatment. The research can provide theoretical reference for selecting appropriate treatment materials and evaluating their performance after secondary damage in engineering.

隧道衬砌结构经常出现裂缝和漏水。处理材料易受结构应力和变形的二次损伤。本研究的目的是评估高韧性自愈材料在隧道衬砌结构中处理渗漏水的适用性，并研究衬砌二次损伤后的性能。这是创新和前瞻性的。主要方法是实验。通过对抗压强度、渗透系数、表面裂纹闭合性、孔隙率等自愈指标的测试，对比评价了4种配比试样的自愈效果。通过模拟试验，比较了普通砂浆与自愈材料在衬砌结构初始损伤、处理和二次损伤后的裂缝发展和漏水情况。结果表明，在不同损伤水平下，含聚乙烯醇纤维和微胶囊的高韧性自修复试样在各种性能上表现出最佳的自修复性能，即使在持续恒定载荷下也能保持较高的自修复效率。在衬砌模型中，初始损伤后出现纵向、斜向和周向裂纹。有的裂缝处形成水滴和水流，有的裂缝逐渐渗透，形成湿痕。表面修复后，普通砂浆与自愈材料作为处理材料无显著差异。但与普通砂浆相比，自愈合材料在二次损伤后裂缝明显更细，漏水更少，微裂缝在养护后可以自主修复。两种材料的裂缝发育和二次损伤后漏水情况不同，突出了自愈材料在隧道衬砌处理中的优越性。研究可为工程中选择合适的处理材料及评价其二次损伤后的性能提供理论参考。

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引用次数: 0

Urban underground space for resilient cities 弹性城市的城市地下空间

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-12-30 DOI: 10.1016/j.tust.2025.107412

Wout Broere , Monika Mitew-Czajewska

Urban resilience is the ability of an urban environment, including its infrastructure and inhabitants, to remain functioning in the face of acute shocks and chronic stresses. This paper explores the role underground space plays in urban resilience, considering both short-term events and long-term changes. Underground structures are inherently resilient against damage caused by natural disasters, such as earthquakes, but they can be at higher risk of damage due to sudden flooding. The risk of flooding requires special attention in the context of climate change, as the risk of sudden flood events rises. At the same time underground space offers opportunities to help reduce climate change impacts, and use of underground space is essential in realizing compact and energy efficient cities, and as such is an essential component of a resilient city.

城市韧性是指城市环境，包括其基础设施和居民，在面临急性冲击和长期压力时保持运转的能力。本文从短期事件和长期变化两方面探讨了地下空间在城市韧性中的作用。地下结构对自然灾害（如地震）造成的破坏具有固有的弹性，但由于突然的洪水，它们可能面临更高的破坏风险。在气候变化的背景下，洪水的风险需要特别关注，因为突发洪水事件的风险上升了。与此同时，地下空间提供了帮助减少气候变化影响的机会，地下空间的利用对于实现紧凑和节能的城市至关重要，因此是弹性城市的重要组成部分。

引用次数: 0

Experimental and numerical study on the anti-impact performance of fluted tapered tube 带槽锥形管抗冲击性能的实验与数值研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology

Pub Date : 2025-12-30 DOI: 10.1016/j.tust.2025.107418

Ziyang Li , Xiaochun Xiao , Jun Xu , Baijian Wu , Yishan Pan

Rockbursts present a significant challenge in underground resource extraction and infrastructure development. Their prevention and control have become increasingly critical as mining activities extend to greater depths. To improve the energy absorption capacity of hydraulic supports and address the issue of insufficient anti-impact performance of the support during rockbursts, a fluted tapered tube energy absorption component connected to the column is proposed. Its distinctive feature is the combination of a tapered geometry and flutes, designed to trigger stable, axisymmetric buckling for efficient energy absorption. In this study, the performance of the fluted tapered tube was investigated through both numerical simulations and theoretical analysis. Furthermore, the complex proportional assessment (COPRAS) method was applied to facilitate the selection of the optimal structure. The results indicate that the Y3-5–10 fluted tapered tube exhibits significantly improved anti-impact performance compared to the other 26 structural types. In addition, the results derived from the mean crushing force calculation formula match well with the numerical simulation results. Furthermore, compared with rigid supports, the plastic energy of the support part after adopting the fluted tapered tube decreases by 95%, while impact time is extended by 250% and impact displacement increases by 260%. This performance provides the critical time delay required for the safety valve to open, thereby preventing catastrophic column failure. This study provides practical guidance for designing an energy absorption component with excellent energy absorption efficiency. The proposed component is anticipated to enhance the anti-impact performance of supports and can be applied in rockburst prevention, which is of significant importance for practical engineering applications.

岩爆对地下资源开采和基础设施建设提出了重大挑战。随着采矿活动扩展到更深的深度，预防和控制地雷已变得日益重要。为了提高液压支架的吸能能力，解决支架在冲击地压时抗冲击性能不足的问题，提出了一种与柱连接的槽形锥形管吸能构件。其独特的特点是锥形几何形状和凹槽的结合，旨在触发稳定的轴对称屈曲，以实现高效的能量吸收。本文采用数值模拟和理论分析两种方法对带槽锥形管的性能进行了研究。在此基础上，采用复合比例评价法（COPRAS）进行优化结构的选择。结果表明，Y3-5-10型槽型锥形管的抗冲击性能明显优于其他26种结构类型。平均破碎力计算公式与数值模拟结果吻合较好。与刚性支撑相比，采用带槽锥形管后支撑件塑性能降低95%，冲击时间延长250%，冲击位移增加260%。这种性能提供了安全阀开启所需的临界时间延迟，从而防止了灾难性的柱故障。本研究为设计具有优异吸能效率的吸能元件提供了实践指导。该构件有望提高支架的抗冲击性能，并可应用于岩爆防治，具有重要的工程实际意义。

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引用次数: 0